Two layers separated

Front view of connecting to earbud bottom

BN26V chip on FPC

Microphone for calling at bottom

Sensor to detect the earbuds wearing status

TWS Battery main board and two microphone total

TWS Main board on charging case

Rigid Flex board structure

Speaker connected to the main board with FPC

z93k49 ANC microphone on top and IC with AD8 printed

Connecting to Screen A & B